As the leaders of the EU's remaining 27 member states prepare for the first Brexit summit in Brussels, which issues will shape the agendas of the individual countries taking part?

Germany: Jenny Hill, Berlin

Chancellor Angela Merkel is keen to emphasise that Brexit negotiations are between Britain and the EU but Germany's position will assume a significance above and beyond most - perhaps all - of the other member states.

This is partly because of its economic and political weight in the union but also because, unlike many other countries, it has the resources, the people and the expertise to analyse and work through the administrative complexities of deconstructing Britain's membership.

For a nation that considers itself to be European first, German second, the priority is now the future security of the EU.

Berlin wants to present a united European front in the negotiations, so it's likely to stick to a script agreed with the big EU institutions.

Expect a firm line too from Berlin on the rights of EU citizens living in Britain.

While there is concern in Berlin about the impact of what one German newspaper called "Britain's leap into the dark", and an acknowledgement of, in Mrs Merkel's words, the "enormity and complexity" of the negotiations ahead, but politicians in Berlin worry about the bigger picture too.

Mrs Merkel has made it clear all along that she wants to get on with tackling other challenges facing the union; migration, terrorism, youth unemployment, the impact of digitisation and so on.

And, she said on Thursday that, in a world of global challenges, Europe could not afford to be introspective now.

Berlin didn't want Britain to leave - but, now that the decision's made, it wants "fair and constructive" exit negotiations to be concluded quickly and cleanly.

But it's unlikely to support talks over the shape of the future relationship between the UK and the EU unless Britain first agrees the terms of its exit - ie commits to paying that "Brexit bill".

Berlin wishes to preserve its strong economic relationship with the UK.

But don't expect Germany to be a soft negotiating partner either.

Even business leaders - among them the head of the association of Germany's all-powerful car manufacturers - acknowledge the EU's interests must come first.

Mrs Merkel has warned against the "illusion" the UK can retain or even negotiate better rights than member states.

In Angela Merkel's response to the triggering of Article 50 last month, she chose first to commit to minimising the personal impact of Brexit on EU citizens living in the UK.

And she is expected to seek to protect what she sees as those vital founding freedoms of the EU.

She has repeatedly insisted that there can be no access to the single market without freedom of movement of people - a red line upon which many will seek to compromise but upon which she is likely to stand firm.

France: Hugh Schofield, Paris

France is in the middle of presidential elections, and will have a new head of state in early May.

Since Spain joined the EU, Gibraltar has been able to call on Brussels to intervene when it felt Spain was squeezing traffic unreasonably at the land border, charges Madrid has consistently denied, citing security concerns.

According to the Swedish government, more than 100,000 Swedes, from a population of just 10 million, are based in the UK, and about 1,000 Swedish businesses operate there.

Sweden's Minister for European Affairs and Trade, Ann Linde, has been openly critical of the challenges facing Europeans seeking permanent residency in the UK under current rules, which include filling out an 85-page document and providing evidence of steady work.

While Sweden's centre-left government has said it wants to make sure its old friend gets a "fair deal" in the negotiations, it has made clear that keeping the rest of the 27-member bloc intact is its core goal, a message shared by the country's centre-right opposition parties.

But public support for the anti-immigration Sweden Democrats - who are pushing for a "Swexit"- has crept up to about 19%, with just over a year to go before the country's next general election.

Meanwhile, Sweden has seen a huge spike in citizenship applications from British expats anxious to guarantee their future in Scandinavia, with 1,616 forms submitted in 2016, three times the total of the previous year, 511.

The Netherlands: Anna Holligan, The Hague

A "self-inflicted wound" is how one bewildered Dutch columnist described Brexit.

The UK has historically been one of the Netherlands' closest allies.

Exports between the two run into the tens of billions of euros.

A comprehensive free trade agreement will be a priority - the Dutch government's biggest fear is having to fall back on the World Trade Organization tariffs.

But bear in mind, the Netherlands was one of the first recruits to the EU club of nations and about 80% of the country's GDP comes from exports, most of which (79%) are within Europe.

The strength of Britain's relationship with this small but influential ally could prove critical in determining the nature of the final deal.

They are the masters of compromise, proud of their ability to put differences aside to work together in the common interest, to literally dig the land out of the sea.

They have their people to think about too.

The Dutch foreign minister told the BBC that securing the rights of the approximately 100,000 Dutch citizens who lived in the UK was a top priority in the negotiations.

And the Britons based in the Netherlands are anxious to be afforded the same protections.

The domestic political landscape could also influence the Dutch stance.

Eurosceptic parties performed well in the recent election.

They were emboldened by Brexit, despite the fact support for a "Nexit" fell after Britain demonstrated the complications involved in extricating oneself from the EU.

The Dutch dilemma will be how to maintain the valuable economic, cultural and political links with the UK without bolstering the eurosceptics at home and across the continent who want to destroy their lucrative club.